<div id="panel" class="field formio-component formio-component-panel formio-component-panel formio-component-multiple " ref="component">
  <h4 class="ui top attached block header " ref="header">
    Panel
  </h4>
  <div class="ui bottom attached segment" ref="nested-panel">
  </div>
  <div ref="messageContainer"></div>
</div>